KR20130010578A - The user equipment apparatus for transmitting simultaneously from a plurality of dual band wireless communication scheme and method for dual band transmission thereof - Google Patents

Abstract

PURPOSE: A terminal device and a dual band transmission method thereof are provided to remove IMD(InterModulation Distortion) influence generated in case a plurality of wireless communication chips transmit a signal. CONSTITUTION: A control unit(180) controls a first wireless communication unit(110) and a second wireless communication unit(120). The control unit determines whether a first frequency band of the first wireless communication unit interferes a second frequency band of the second wireless communication unit. The control unit controls offset of resource blocks related to the second frequency band in order to prevent the IMD. [Reference numerals] (110) First wireless communication unit; (120) Second wireless communication unit; (150,160) First antenna; (180) Control unit

Description

A terminal device for simultaneously transmitting signals in a plurality of wireless communication chips to which the dual band communication method is applied, and a method for dual band transmission of the terminal device simultaneously from a plurality of dual band wireless communication scheme and method for dual band transmission

The present invention relates to offset control of a resource block of a terminal device, and more particularly, to control the offset of the resource block of the terminal device for transmitting signals simultaneously in a plurality of wireless communication chips to which different wireless communication methods are applied. will be.

Due to the remarkable development of wireless communication technology, the use of radio waves is increasing in demand, and is widely used in medical, transportation, and everyday life as well as communication and broadcasting fields.

Conventionally, in a wireless communication system, a terminal does not occur when a dual band signal is simultaneously transmitted in a licensed band. However, with the development of wireless communication technology and the use of radio waves, it is necessary to use a voice service (Data Service) and data service (Data Service) using a licensed band as demand thereof increases.

Accordingly, in the case of a terminal supported with a dual band, there is a scenario of simultaneously transmitting a voice service and a data service through the dual band. In this case, conventionally, since two antennas are designed to transmit / receive each other, intermodulation distortion (IMD) occurs, which causes a problem that the reception sensitivity of a specific band of the terminal is considerably reduced. There was.

However, no means have yet been proposed to solve this problem.

An object of the present invention is to provide a terminal device capable of simultaneously transmitting signals in a plurality of wireless communication chips to which different wireless communication methods are applied.

Another object of the present invention is to provide a method of controlling an offset of a resource block allocated to a terminal device capable of simultaneously transmitting signals in a plurality of wireless communication chips to which different wireless communication methods are applied.

The technical problems to be solved by the present invention are not limited to the technical problems and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a mobile terminal comprising: a first wireless communication unit transmitting a first signal in a first communication method, a second wireless communication unit transmitting a second signal in a second communication method, and A control unit for controlling the first wireless communication unit and the second wireless communication unit, a combination in which the first frequency band of the first wireless communication unit affects the second frequency band of the second wireless communication unit (InterModulation Distortion, IMD) If the first frequency band is a combination that affects the second frequency band and the intermodulation distortion, resource blocks associated with the second frequency band to prevent the intermodulation distortion. The control unit, to adjust the offset of the.

The first wireless communication unit transmits a voice signal, and the first communication method includes a code division multiple access (CDMA) method.

The second wireless communication unit transmits a data signal, and the second communication method includes a Long Term Evolution (LTE) method.

The controller may determine the sum of the transmission power of the first signal and the transmission power of the second signal to adjust the offset of the resource blocks only when the sum of the transmission powers is equal to or greater than a predetermined threshold. .

Optionally, a base station determines an offset of the resource block for preventing the intermodulation distortion, and the controller adjusts the offset of the resource block according to the determination of the base station.

The dual band transmission method according to another example of the present invention for achieving the above technical problem is a step of initiating wireless communication in a dual band (dual band), and transmits the first signal in a first communication scheme, the second communication In the initiating step of transmitting a second signal in a manner such that the first frequency band in which the first signal is transmitted is a combination having an influence on the second frequency band in which the second signal is transmitted and an InterModulation Distortion. And when the first frequency band is a combination that affects the second frequency band and the intermodulation distortion, the resource blocks associated with the second frequency band to prevent the intermodulation distortion. Adjusting the offset.

According to the terminal and the transmission power control method of the terminal according to the present invention, it is possible to significantly improve the communication performance by eliminating the effects of IMD that may occur when transmitting signals simultaneously in a plurality of wireless communication chips to which different wireless communication methods are applied. have.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide an embodiment of the present invention and together with the description, illustrate the technical idea of the present invention.
1 is a view showing an example of the configuration of a terminal 100 according to the present invention.
2 is a graph illustrating an operation of generating an IMD when different wireless communication schemes are applied in connection with the present invention.
3 is a flow chart showing the flow of a method for controlling a resource block allocated by the terminal 100 according to the present invention.
4 illustrates an example of a method of adjusting an offset of a resource block according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

In addition, in the description of the present invention, the terminal may be mobile or stationary such as a user equipment (UE), a mobile station (MS), an improved mobile station (AMS), a mobile hand set, or the like. It is assumed that all the communication devices used by the user of. In addition, it is assumed that the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a base station (BS), and an access point (AP).

The term "wireless communication method" in the present invention may be referred to in various forms such as a radio access technology (RAT) method. Examples of a wireless communication method or a wireless access technology method include code division multiple access (CDMA), wideband code division multiple access (WCDMA), and long term evolution (LTE).

In a wireless communication system, a terminal may receive a signal through a downlink from a base station, and the terminal may also transmit a signal through an uplink. The information transmitted or received by the terminal includes data and various control information, and various physical channels exist depending on the type of information transmitted or received by the terminal.

In the present specification, the first wireless communication unit and the second wireless communication unit may be configured as a chip for transmitting signals by applying different wireless communication schemes or wireless access technology schemes. Hereinafter, as an example, the first wireless communication unit may be a communication module for transmitting a signal applying the CDMA scheme, and the second wireless communication unit may be a communication module for transmitting a signal applying the LTE scheme. However, it is not limited to this example.

1 is a diagram illustrating an example of a configuration of a terminal 100 according to the present invention.

Referring to FIG. 1, the terminal 100 includes a first wireless communication unit 110, a second wireless communication unit 120, a first power amplifier 130, a second power amplifier 140, a first antenna 150, It may include a second antenna 160 and the controller 180.

In radio communication, radio waves of a specific frequency band are used. The first and second radio communication units 110 and 120 modulate the original signal (baseband signal) into a signal of a high frequency band during signal transmission. Demodulate the received high frequency signal into a baseband signal. Each wireless communication unit (110, 120) may be implemented as a "RF (Radio Frequency) chip" for modulating the signal processed in the baseband to a signal of a high frequency band, the baseband chip processing the baseband signal and a signal transmission and reception process In the present invention, an RF chip that modulates a signal processed in the baseband into a high frequency band or demodulates a received signal into a low frequency band and processes the signal into a baseband signal may be implemented as an “RF and baseband chip”.

In addition, the first and second wireless communication units 110 and 120 may be implemented as separate chips as illustrated in FIG. 1, or may be implemented as one chip.

As described above, the first wireless communication unit 110 and the second wireless communication unit 120 processes the original signal as a signal of a high frequency band in the signal transmission process, and conversely, in the signal reception process, the signal of the high frequency band It processes the signal and modulates / demodulates each.

When the terminal 100 needs to simultaneously transmit signals from the plurality of wireless communication units 110 and 120 to which different wireless communication schemes are applied, the first wireless communication unit 110 converts the original signal into a signal of the first frequency band. At the same time, the second wireless communication unit 120 may perform a function of processing the original signal into a signal of the second frequency band. That is, the terminal 100 may modulate and transmit signals in different frequency bands in the first and second wireless communication units 110 and 120 in the signal transmission process. In general, when the terminal 100 simultaneously transmits signals processed by the first and second wireless communication units 110 and 120, the terminal 100 may transmit signals through different frequency bands.

An interface (not shown) is connected to exchange signals and information between the first wireless communication unit 110 and the second wireless communication unit 120 as well as between components in the terminal 100.

The first power amplifier (PA) 130 serves to amplify the received signal processed by the first wireless communication unit 110, the second power amplifier 140 in the second wireless communication unit 120 Each is processed (especially in a different frequency band) to amplify the received signal. Signals processed or received in respective bands are transmitted and received through the first antenna 150 and the second antenna 160, respectively.

The controller 180 may play a role of freeing the transmission and reception of the terminal 100 and enabling a call in various environments. The controller 180 may function as a module for filtering and amplifying, and may include a receiving module including a receiving signal filtering filter and a transmitting module including a power amplifier for amplifying a transmitting signal.

In addition, the controller 180 may be used to transmit a signal through multiple frequency bands, such as the terminal 100 described in the present invention. For example, the controller 180 enables the terminal 100 to simultaneously use the GSM method and the W-CDMA method. The number of parts of the terminal 100 may be reduced through the function of the controller 180, and not only the reliability of the terminal 100 may be increased but also the loss due to the interconnection between the parts may be reduced.

The controller 180 significantly reduces the power consumption, significantly improves battery consumption, and enables miniaturization of components of a multi-frequency band and a multifunction terminal. As illustrated in FIG. 1, the controller 180 may transmit signals processed in a plurality of frequency bands received from the power amplifier 130 and the power amplifier 140 through the antennas 150 and 160, respectively.

In addition, although the antennas 150 and 160 transmit signals to the outside (for example, a base station) and are shown in two in FIG. 1, one or more antennas may exist in the terminal 100.

2 is a graph illustrating an operation of generating an IMD when different wireless communication schemes are applied in connection with the present invention.

In the context of the present invention, intermodulation distortion (IMD) is the result of intermodulation of a signal that is not present at the output at the output stage when two or more frequencies pass through a nonlinear system or circuit, and the IMD is caused by such an intermodulation (IM) component. Distortion itself.

The reason why this IMD is important is that in digital systems such as CDMA, unlike analog systems, one signal does not use one frequency, or one channel, but multiple signals share a wide channel bandwidth. That is, since signals of multiple frequencies are simultaneously input to a system that processes one band, the signals may not be properly processed if they are mixed and generated by mixing signals of multiple frequencies at the output terminal.

Referring to Fig. 2 (a), a situation in which an IMD is generated will be described. As shown in the figure, assume that there are two frequencies f1 and f2. Even if two frequencies are present, the output will be a mixed signal with a mixture of two frequencies. However, perfect multiples harmony such as 2 * f1, 3 * f2 can be filtered.

The problem, however, is the third order term, 2 * f1-f2 and 2 * f2-f1, which are problematic because they stick very close to the f1 and f2 signals. In FIG. 2 (a), it is possible to confirm the existence of the third order terms 2 * f1-f2 and 2 * f2-f1 in addition to the two frequencies f1 and f2. The IMD mainly refers to this third order intermodulation component. Therefore, signals commonly referred to as IMD often mean 3rd order IMD. Typically, IM, also referred to as IMD, is also specifically called IM3 because its third frequency component is the main rejection object. In particular, since the 3rd order IMD increases numerically as the input signal increases, it is initially increased by a cube. Therefore, when the IMD is initially small but the input signal increases, the 3rd order IMD increases with a much faster slope than the original signal, which is similar to the original signal power. Occurs until. The point where the IMD approximates the power of the original signal is called IP3.

As such, the IMD refers to a degree of distortion of a signal due to intermodulation, and IP3 is used as a specification or a reference value of an actual product. In superheterodyne, which uses intermediate frequency (IF), intermodulation is important to eliminate the 3rd IM because its third term is closest to the original signal. Therefore, it is desirable to reduce the effects of signal distortion and interference such as IMD.

Referring to FIG. 2 (b), a case where IMD is a problem in frequency bands instead of one frequency will be described. As described above, when there are several frequencies, an IMD, which is a intermodulation phenomenon, is generated accordingly, and there is a possibility that an IMD is also generated when transmitted in different frequency bands. However, even if IMD actually occurs, not all of them affect the transmission / reception system. For example, only IMD above a certain power may cause problems in each transmit / receive frequency band. In addition, when transmitting in different frequency bands, the entire frequency band does not cause the IMD, but the probability that the IMD is generated due to some of the frequency bands is greater.

Referring to FIG. 2 (b), when transmitting in the first frequency band band 1 and the second frequency band band 2, the entire first frequency band or the entire second frequency band does not generate an IMD. For example, the IMD may be affected only when transmitted in a specific band Δα of the first frequency band and a specific band Δβ of the second frequency band. Accordingly, in the drawing, the IMD may affect the communication system when it corresponds to hatched bands of two frequency bands.

3 is a flowchart illustrating a method of controlling a resource block allocated to a terminal 100 according to the present invention.

The controller 180 performs the SV-LTE mode (S310). The controller 180 determines whether the sum of the power of the first frequency band and the power of the second frequency band exceeds a specific threshold value (S320). If not exceeded, the signal is transmitted and received through a conventional procedure (S350). If the specific threshold is exceeded, the controller 180 determines whether the first frequency band includes a band that results in IMD (S330). If not included, the signal is transmitted and received through a conventional procedure (S350). If the first frequency band includes a band resulting in the IMD, the controller 180 adjusts the offset of the resource block of the second frequency band to prevent generation of the IMD (S340).

Hereinafter, the present invention will be described according to the flow of the resource block control method of the mobile terminal of FIG. 3.

First, in step S310, the controller 180 performs the SV-LTE mode.

SV-LTE mode is a Simultaneous Voice LTE mode, which means a communication mode that can simultaneously provide voice and data. As illustrated in FIG. 1, two or more different communication schemes may be applied to the mobile terminal 100 in hardware. For example, one CDMA 1x method for transmitting and receiving voice and the other LTE method for transmitting and receiving data may be applied. Each of the wireless communication units 110 and 120 has a different communication scheme, and thus does not affect each other. However, as described above, there may be a problem of mixed demodulation (IMD).

The present invention is applied in the dual band mode to which the different communication schemes are applied, and the controller 180 performs the SV-LTE mode in which the communication scheme of the mobile terminal 100 is the dual band mode.

In step S320, the controller 180 determines whether the sum of the power of the first frequency band and the power of the second frequency band exceeds a specific threshold.

There are a variety of factors that affect the transmission and reception of the IMD. For example, depending on how much each frequency of the dual band is, it may be determined whether the IMD affects the actual signal transmission or reception, or the IMD may be affected according to the power of each signal of the dual band.

As shown in FIG. 2, each signal of the dual band has a constant power, and a signal generated according to the IMD also has a constant power. In general, the signal generated according to the IMD is influenced by the signals of each of the dual bands, that is, the power of the first signal of the first wireless communication unit and the power of the second signal from the second wireless communication unit.

Experimentally, in order to cause the problem that the IMD affects the actual signal transmission and reception, it is known that the sum of the power of the first signal and the power of the second signal exceeds a certain level. Since the present invention is applied to the case where the IMD affects the actual signal transmission and reception, if the sum of the powers is smaller than the preset threshold, the signal can be transmitted and received without adjusting the resource block through a general process. Will be.

Here, the preset threshold is an experimentally determined value and may be variously determined according to the type of the terminal. For example, a factor for determining a threshold may be a value at which a data sensitivity of the terminal reaches a certain level. For example, if the data sensitivity set by the user or the manufacturer is -96.5 dBm, and the sum of the power of the first signal and the power of the second signal, which causes the data sensitivity to reach -96.5 dBm, is 12 dBm, the threshold value. Is set to 12 dBm.

If the sum of the powers does not exceed a specific threshold value, a general signal transceiving process is performed through step S350.

In step S330, the controller 180 determines whether the first frequency band includes a band resulting from the IMD.

Referring back to FIG. 2 (b), not all of the Δf1 of the first frequency band band 1 results in an IMD. That is, when it corresponds to a partial band Δα of the first frequency band and corresponds to a partial band Δβ of the second frequency band, it may result in generating an IMD. Therefore, in the case where the band corresponds to a band other than Δα in the first frequency band, since the IMD is not a problem in the signal transmission / reception process, it is not necessary to adjust the offset of the resource block. According to the present invention, an offset of a resource block related to data communication may be adjusted according to which of the first frequency bands a transmission / reception band of a voice signal belongs to.

On the other hand, since the IMD is generated while the two different bands affect the dual band situation, there may be multiple pairs of frequency bands of each of the dual bands generating the IMD. For example, band a of the first frequency band and band b of the second frequency band may generate IMD, and band c of the first frequency band and band d of the second frequency band may generate IMD.

In step S340, the controller 180 adjusts the offset of the resource block of the second frequency band.

This is a case where the steps S320 and S330 are performed, and the IMD can affect the actual signal transmission / reception process. The controller 180 needs to adjust a band used for transmitting and receiving data signals in the second frequency band.

In the present invention, as an example for preventing IMD, an offset of a resource block of a second frequency band, which is a data communication band, may be adjusted.

Referring to FIG. 2B again, even if voice communication is transmitted and received in Δα of the first frequency band, if data is transmitted and received in a band not corresponding to Δβ of the second frequency band, the possibility of IMD may be significantly reduced. Can be. Therefore, the controller 180 may select a method of adjusting the offset of the resource block by changing a part of the frequency band.

4 is a diagram illustrating an example of a method of adjusting an offset of a resource block according to the present invention.

Referring to FIG. 4 (a), the structure of a resource block will be schematically described. The mobile terminal 100 may set 50 resource blocks in a signal transmission and reception process. Therefore, RB # 0, RB # 1,... Up to 50 resource blocks up to RB # 48 and RB # 49 can be configured for data transmission and reception. Each resource block consists of one slot and twelve subcarriers. One slot consists of seven symbols. Various data are allocated and transmitted to a resource element (RE) consisting of one symbol and one subcarrier.

One subcarrier is 15 kHz, and one resource block composed of 12 subcarriers is 180 kHz. In addition, since the UE can set 50 resource blocks, it is possible to set a frequency band of 50 × 180 kHz = 9 MHz as the data communication band. That is, the data communication band used as the second frequency band may be set to a band of approximately 9 MHz.

The controller 180 may exclude a band causing an IMD in a relationship with the first frequency band among the second frequency bands used in this way.

Referring to FIG. 4B, an operation of adjusting an offset of a resource block among 50 resource blocks (RBs) allocated to a terminal is illustrated. If there is no frequency band for generating an IMD among the first frequency bands, all 50 resource blocks of the second frequency bands may be selected without limitation. However, since it is determined that a specific band among the first frequency bands generates an IMD, an offset of 50 resource blocks of the second frequency band is set as a specific offset. In the figure, it is set to allocate a resource block from the third resource block of the 50 resource blocks. If a specific band (for example, 45 to 55 ch) of the first frequency band is an issue with RB # 0 to RB # 2 and IMD of the second frequency band, the controller 180 controls the RB of the second frequency band. Exclude the band of # 0 ~ RB # 2. Therefore, in the figure, by setting the offset of the resource block to 3, data resources are allocated from RB # 3 and set to transmit and receive signals.

On the other hand, as described above, since there may be several pairs of bands in which IMD is a problem, different offset settings are required accordingly. For example, if a specific band (1003 to 1023Ch) of the first frequency band has room to generate a specific band (RB # 0 to RB # 13) and the IMD of the second frequency band, the control unit may set the offset of the resource block to RB. Can be set to # 14. In addition, if a specific band (21 to 41Ch) of the second frequency band has room to generate a specific band (RB # 0 to RB # 5) and the IMD of the second frequency band, the controller 180 adjusts the offset of the resource block. Can be set to RB # 6. Finally, if a specific band (45 to 55Ch) of the second frequency band has room to generate a specific band (RB # 0 to RB # 2) and IMD of the second frequency band, the controller 180 may offset the resource block. Can be set to RB # 3. On the other hand, the specific band of the first frequency and the second frequency band of the IMD problem is exemplary and can be determined experimentally.

In the above description, the subject controlling the offset of the resource block has been described as the controller 180 of the mobile terminal 100. The controller 180 may set the offset of the resource block by checking the actual frequency bands of the first wireless communication unit 110 and the second wireless communication unit 120 of the mobile terminal 100. Alternatively, however, the base station may be the subject that determines the offset of the resource block of the second frequency band. For example, a base station transmitting and receiving a voice or data signal with the mobile terminal 100 may check the frequency band of the mobile terminal 100. In addition, the base station can easily identify a frequency band in which there is an error or load, and the base station may efficiently identify the first frequency band and the second frequency band in which the IMD may be generated. Accordingly, the base station may play a role of adjusting the offset of the resource block by the controller 180. In this case, information related to offset adjustment of the resource block by the base station may be added to the transmission and reception signals of the base station and the terminal 100.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) Field Programmable Gate Arrays), a processor, a controller, a microcontroller, a microprocessor, or the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature shall be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to construct embodiments of the present invention by combining some of the elements and / or features. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is clear that the claims that are not expressly cited in the claims may be combined to form an embodiment or be included in a new claim by an amendment after the application.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above detailed description should not be interpreted as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

100 mobile terminal 110 first wireless communication unit
120 second wireless communication unit 130 first power amplifier
140 second power amplifier 180 control unit

Claims (13)

A first wireless communication unit for transmitting a first signal in a first communication scheme;
A second wireless communication unit which transmits a second signal in a second communication scheme; And
As a control unit for controlling the first wireless communication unit and the second wireless communication unit,
It is determined whether the first frequency band of the first wireless communication unit is a combination influencing the second frequency band of the second wireless communication unit and intermodulation distortion (IMD),
When the first frequency band is a combination that affects the second frequency band and the intermodulation distortion, the offset of the resource blocks associated with the second frequency band is adjusted to prevent the intermodulation distortion. , Including the control unit,
Mobile terminal. The method of claim 1,
The first wireless communication unit, characterized in that for transmitting a voice signal,
Mobile terminal. 3. The method according to claim 1 or 2,
The first communication scheme includes a code division multiple access (CDMA) scheme.
Mobile terminal. The method of claim 1,
The second wireless communication unit, characterized in that for transmitting a data signal,
Mobile terminal. The method according to claim 1 or 4,
The second communication scheme includes a Long Term Evolution (LTE) scheme.
Mobile terminal. The method of claim 1,
The controller determines the sum of the transmission power of the first signal and the transmission power of the second signal to adjust the offset of the resource blocks only when the sum of the transmission powers is equal to or greater than a predetermined threshold. ,
Mobile terminal. The method of claim 1,
A base station determines an offset of the resource block to prevent the intermodulation distortion phenomenon,
The control unit adjusts the offset of the resource block according to the determination of the base station,
Mobile terminal. Initiating wireless communication in a dual band, the initiating step of transmitting a first signal in a first communication scheme and a second signal in a second communication scheme;
Determining whether a first frequency band in which the first signal is transmitted is a combination influencing InterModulation Distortion with a second frequency band in which the second signal is transmitted; And
When the first frequency band is a combination that affects the second frequency band and the intermodulation distortion, the offset of the resource blocks associated with the second frequency band is adjusted to prevent the intermodulation distortion. Comprising the steps,
Dual band transmission method. The method of claim 8,
The first signal is characterized in that the voice signal,
Dual band transmission method. 10. The method according to claim 8 or 9,
The first communication scheme includes a code division multiple access (CDMA) scheme.
Dual band transmission method. The method of claim 8,
The second signal is characterized in that the data signal,
Dual band transmission method. The method according to claim 8 or 11, wherein
The second communication scheme includes a Long Term Evolution (LTE) scheme.
Dual band transmission method. The method of claim 8,
The adjusting step,
And adjust the offset of the resource blocks only when the sum of the transmit power of the first signal and the transmit power of the second signal is equal to or greater than a predetermined threshold.
Dual band transmission method.

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